I have a bag with a toothbrush and toothpaste and all the things I might need during the day. I call the bag my trailer. Sometimes you don't have a trailer, so that's my trailer.
Most scripts are written to be green lit. They're not written to be acted. And a lot of writers with the greatest intention in the world don't write for actors. They don't understand the architecture of what an actor needs to get from point A to point B.